Weekly seminar by Professor Peter Schreiner: London Dispersion Effects in Molecular Chemistry – Reconsidering Steric Effects
|Event Name||Weekly seminar by Professor Peter Schreiner: London Dispersion Effects in Molecular Chemistry – Reconsidering Steric Effects|
|Start Date||23 Apr 2019 1:00 pm|
|End Date||23 Apr 2019 2:00 pm|
Professor Peter R. Schreiner from Institute of Organic Chemistry, Justus-Liebig University (Germany) will give a weekly seminar, London Dispersion Effects in Molecular Chemistry – Reconsidering Steric Effects, on Tuesday, 23rd April, 1 - 2pm in 4WW 322 seminar room. All welcome!
The Gecko can walk up a glass window because of the adhesion in hydrophobic setae on its toes that convey van der Waals (vdW) interactions with the surface. The attractive part of such vdW-interactions is an electron correlation effect referred to as London dispersion. Its role in the formation of condensed matter has been known since the work of van der Waals and London who related dispersion to polarizability. London dispersion has been underappreciated in molecular chemistry as a key element of structural stability, chemical reactivity, and catalysis. This negligence is due to the notion that dispersion is weak, which is only true for one pair of interacting atoms. For increasingly larger structures, the overall dispersion contribution grows rapidly and can amount to tens of kcal mol–1. This presentation shows selected examples that emphasize the importance of inter- and intramolecular dispersion for molecules consisting mostly of first row atoms. We note the synergy of experiment and theory that now has reached a stage where dispersion effects can be examined in fine detail. This forces us to re-consider our perception of steric hindrance and stereoelectronic effects, and even the transferability of chemical bond parameters from one molecule to another.
Weekly seminar schedule can be found here